v3.26.1
Retirement And Other Postretirement Benefits (Schedule of Expected Benefit Payments) (Details) - Pension Plan [Member] - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2026
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Plan Assets, Contributions by Employer     $ 85,100    
Qualified Plan          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Service Cost $ 23,078 $ 23,617 46,156 $ 47,234  
Entergy Louisiana [Member]          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year 41,599   41,599    
Defined Benefit Plan, Plan Assets, Contributions by Employer     16,351    
Entergy Louisiana [Member] | Qualified Plan          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Service Cost 5,320 5,454 10,640 10,908  
Entergy Louisiana [Member] | Subsequent Event [Member]          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year         $ 25,248
Entergy Mississippi [Member]          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year 3,991   3,991    
Defined Benefit Plan, Plan Assets, Contributions by Employer     2,026    
Entergy Mississippi [Member] | Qualified Plan          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Service Cost 1,296 1,304 2,592 2,608  
Entergy Mississippi [Member] | Subsequent Event [Member]          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year         1,965
Entergy New Orleans [Member]          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year 3,304   3,304    
Defined Benefit Plan, Plan Assets, Contributions by Employer     1,552    
Entergy New Orleans [Member] | Qualified Plan          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Service Cost 265 411 530 822  
Entergy New Orleans [Member] | Subsequent Event [Member]          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year         1,752
Entergy Texas [Member]          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year 5,931   5,931    
Defined Benefit Plan, Plan Assets, Contributions by Employer     2,604    
Entergy Texas [Member] | Qualified Plan          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Service Cost 1,011 1,024 2,022 2,048  
Entergy Texas [Member] | Subsequent Event [Member]          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year         3,327
System Energy [Member]          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year 13,249   13,249    
Defined Benefit Plan, Plan Assets, Contributions by Employer     5,626    
System Energy [Member] | Qualified Plan          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Service Cost 1,326 1,372 2,652 2,744  
System Energy [Member] | Subsequent Event [Member]          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year         7,623
Entergy Arkansas [Member]          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year 29,716   29,716    
Defined Benefit Plan, Plan Assets, Contributions by Employer     12,073    
Entergy Arkansas [Member] | Qualified Plan          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Service Cost $ 4,363 $ 4,427 $ 8,726 $ 8,854  
Entergy Arkansas [Member] | Subsequent Event [Member]          
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year         $ 17,643